Comput'Organ is a  Pipe Organ Console emulation Freeware that will allow you to play in real-time on a keyboard configuration composed of 1 to 3 MIDI keyboards and a pedal board  connected to your PC or of listening to your Pipe Organ Midi Files from your sequencer pulling up to 15 stops. The program and a special Soundfont bank can be downloaded from the Comput'Organ site at http://members.aol.com/Computorgan/

The KeyKit programming language download site... http://www.nosuch.com/keykit/index.html

A very good Organ Soundfont file by John W. McCoy... http://members.aol.com/realmac/jeux1.htm

PfeifenOrgel quality organ Soundfont file by Andreas Sims... http://home.t-online.de/home/andreas.sims